Added order tracking for Google Analytics 4

[fballiano]

In #3090 it was pointed out that the previous UA/GA implementation supported the order data tracking, while the GA4 implementation isn't.

This PR aims to add the order tracking to GA4.

Fixed Issues (if relevant)

1. Fixes Google Analytics 4 / GA4 does not track conversions (orders) #3090

Manual testing scenarios (*)

1. Enable Analytics 4 in the backend configuration
2. Place an order
3. Check that there are no javascript errors and that the order data is sent to analytics

[sreichel]

Possible to add tax and category information?

[fballiano]

I've added the tax amount but I wouldn't add the categories, the trees can be too different from store to store (very deep, with categories with the same names across branches etc) so IMHO we'd some configuration options and multiple implementations for that.

I'll copy paste some code I wrote as a test:

                $categories = [];
                /** @var Mage_Catalog_Model_Category $category */
                foreach ($product->getCategoryCollection() as $category) {
                    $categories[] = $category->getId();
                    foreach ($category->getParentCategories() as $parentCategory) {
                        $categories[] = $category->getId();
                    }
                }
                $categories = array_unique($categories);
                $categoryCollection = Mage::getResourceModel('catalog/category_collection')
                    ->addAttributeToSelect('name')
                    ->addAttributeToFilter('is_active', 1)
                    ->addAttributeToFilter('entity_id', array('in' => $categories));
                $categories = [];
                foreach ($categoryCollection as $category) {
                    $categories[] = $category->getName();
                }
                $categories = array_slice(array_values(array_unique($categories)), 0, 5);
                foreach ($categories as $i => $category) {
                    $i += 1;
                    $i = $i == 1 ? '' : $i;
                    $orderData['item_category' . $i] = $category;
                }

but I'm not committing it, I think we shouldn't have the category for the time being.

[fballiano]

@loekvangool could you test this?

[fballiano]

@loekvangool?

[fballiano]

This PR is the reason why I won't even take a look at #3121, you develop something that somebody asked, you update it based on someone else's feedback and then nobody cares taking a look at it. neither the person who asked for it nor the other one that asked for modifications...

What a great waste of time.

[ADDISON74]

It's not a waste of time, unfortunately we lack people to allocate a little of their daily time for this project. I wouldn't push things, because there are still a few of us who are moving something around here. I also felt a frustration last year when for a while I didn't see any approved PR.

[sreichel]

nor the other one that asked for modifications...

Me? I gave thumbs up ... ?!?

The base branch was changed.

[matteotestoni]

GA3 stop july. Is possibile approve this before july?

[fballiano]

@matteotestoni if you review it (clicking on the "files changed" and then "review" button) you can make the difference, with 3 reviews with non-admins we can still merge!

[matteotestoni]

@matteotestoni if you review it (clicking on the "files changed" and then "review" button) you can make the difference, with 3 reviews with non-admins we can still merge!

done

[fballiano]

I've to rebase it on the main branch 🤞

[ADDISON74]

Based on the image above I would like to discuss a few questions

• When there will be only the "Google Analytics 4" option, do we still need the other options in the Type list?

• Has anyone used the "IP anonymization" facility so far?

Testing this PR, the script is found in the page source code. Unfortunately I can't make the changes in a production server that I already manage to check what is displayed in the GA interface.

            <!-- BEGIN GOOGLE ANALYTICS 4 CODE -->
        <script async src="https://www.googletagmanager.com/gtag/js?id=ADDISON74"></script>
        <script>
            window.dataLayer = window.dataLayer || [];
            function gtag(){dataLayer.push(arguments);}
            gtag('js', new Date());
            gtag('config', 'ADDISON74');
                    </script>
        <!-- END GOOGLE ANALYTICS 4 CODE -->

[fballiano]

in the future i'd still leave the select, for an eventual GA5 or whatever.

the IP anonymization I've used it in the past. it's not necessary for GA4 since it's the default and only way the data is sent.

[ADDISON74]

I approved it because this change must be made ASAP. I appreciate that Google Analytics 4 is the first option in the list. If there will be any issue, I have no doubt that they will not be reported and solved.

[fballiano]

merging for 2 gray checks and 1 green.

cherry picked on v19 too since the ga4 implementation wasn't complete but was already merged there.

[fballiano]

i've this same code on a customer's website since a while